Electromagnetic coupling effects in natural inflation
General Relativity and Quantum Cosmology
2020-08-26 v1 High Energy Physics - Theory
Abstract
In this work we study the effects of the electromagnetic coupling in natural inflation in a systematic manner using the Schwinger-Keldysh formalism. The corresponding influence functional is evaluated to one-loop level. It can be interpreted as due to a single stochastic force. The equation of motion of the inflaton field is therefore given in the form of a Langevin equation. Lastly, the two-point and the three-point correlation functions of the inflaton field are worked out. They are related to the power spectrum and the nongaussianity of the inflaton field, respectively.
Cite
@article{arxiv.1907.06204,
title = {Electromagnetic coupling effects in natural inflation},
author = {Hing-Tong Cho and Kin-Wang Ng},
journal= {arXiv preprint arXiv:1907.06204},
year = {2020}
}
Comments
22 pages